This is a 1st variety skinny box vintage Ibanez Tube Screamer TS-808 overdrive pedal. The legendary Tube Screamer has been used by guitarists such as Stevie Ray Vaughan to create their signature sound, and is one of the most popular and most copied overdrive pedals of all time. This particular example is in very excellent 100% original vintage condition.
This particular TS-808, is the very first variety narrow box Tube Screamer featuring the early MC1458P chip, otherwise found in the Overdrive II that preceded the Tube Screamer. It would rate a conservative 8.5/10, and as mentioned, is 100% original, including: hardware, knobs, paint, screws, bottom-plate etc.
The Tube Screamer name isn’t far off from the way it sounds, creating beautiful overdrive with rich harmonic overtones. It’s warm, mid-boosted tone is what made it popular with many blues players. With this particular chip, however, the pedal produces slightly more gain. I personally prefer this variety to the more standard issue, as it has a little more personality.